mc9s08lg32 Freescale Semiconductor, Inc, mc9s08lg32 Datasheet - Page 29

• Manufacturer Part Number: mc9s08lg32
• Description: 8-bit Hcs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

2.11
This section describes timing characteristics for each peripheral system.
2.11.1
Freescale Semiconductor
1
2
3
4
5
6
Num
Typical values are based on characterization data at V
This is the shortest pulse that is guaranteed to be recognized as a reset pin request.
To enter BDM mode following a POR, BKGD/MS should be held low during the power-up and for a hold time of t
rises above V
This is the minimum pulse width that is guaranteed to pass through the pin synchronization circuitry. Shorter pulses may or
may not be recognized. In stop mode, the synchronizer is bypassed so shorter pulses can be recognized.
Timing is shown with respect to 20% V
Except for LCD pins in Open Drain mode.
1
2
3
4
5
6
7
8
9
C
D
D
D
D
D
D
D
D
C
AC Characteristics
Control Timing
Bus frequency (t
Internal low power oscillator period
External reset pulse width
Reset low drive
BKGD/MS setup time after issuing background debug
force reset to enter user or BDM modes
BKGD/MS hold time after issuing background debug
force reset to enter user or BDM modes
IRQ pulse width
Keyboard interrupt pulse width
Port rise and fall time — (load = 50 pF)
LVD
Asynchronous path
Synchronous path
Asynchronous path
Synchronous path
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
.
RESET PIN
cyc
= 1/f
4
4
2
2
Rating
Bus
2
DD
MC9S08LG32 Series Data Sheet, Rev. 4
Preliminary - Subject to Change Without Notice
)
and 80% V
Table 14. Control Timing
Figure 19. Reset Timing
5, 6
DD
3
DD
levels. Temperature range –40 °C to 105 °C.
= 5.0 V, 25 °C unless otherwise stated.
t
extrst
Symbol
t
t
t
MSSU
t
t
t
rstdrv
t
t
t
t
f
extrst
MSH
t
LPO
Rise
Bus
ILIH
IHIL
ILIH
IHIL
Fall
1.5 x t
1.5 x t
66 x t
Min
700
100
500
100
100
100
dc
—
—
cyc
cyc
cyc
Typ
Electrical Characteristics
30
—
—
—
—
—
—
—
—
—
—
3
1
1300
Max
20
—
—
—
—
—
—
—
—
—
—
MSH
after V
MHz
Unit
μs
ns
ns
ns
μs
ns
ns
ns
DD
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